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Re: [MW:10198] can we use same pqr

By Materials & Welding
Yes can be used. Cooling rate is not a essential/Supp essential variable as per ASME Sec.IX. Rate of cooling is a function of thickness and this is to attain uniformity in temperature throughout the component.

J.GERALD JAYAKUMAR
00919344954677
 


--- On Mon, 3/7/11, nadakuditi kiran kumar <kinnu78@gmail.com> wrote:

From: nadakuditi kiran kumar <kinnu78@gmail.com>
Subject: [MW:10195] can we use same pqr
To: materials-welding@googlegroups.com
Date: Monday, March 7, 2011, 9:52 AM

dear experts,
we have a PQR qualified in p5b material with test conducted on coupon thickness is 14mm and dia of coupon is 4'', pwht rate of cooling is 100 degree c.my question is can we obtain WPS with the use of above qualified PQR for welder qualification having 5b material and thickness of pipe is 6.55, dia of pipe is 5'',rate of cooling is 200 degree celcius. please clarify

thanks in advance
have a good day

N.V.KIRAN KUMAR,
+91- 8019795360

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